Github user srowen commented on a diff in the pull request: https://github.com/apache/spark/pull/10312#discussion_r47672218 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/DataFrameWriter.scala --- @@ -265,10 +266,22 @@ final class DataFrameWriter private[sql](df: DataFrame) { * @param connectionProperties JDBC database connection arguments, a list of arbitrary string * tag/value. Normally at least a "user" and "password" property * should be included. + * @param columnMapping Maps DataFrame column names to target table column names. + * This parameter can be omitted if the target table has/will be --- End diff -- Indent on subsequent lines looks 5 spaces too deep. Unless there's a compiler reason it won't work, you can simply make it default to an empty `Map`.
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